you left out OpenStreetBugs

... where I live, OpenStreetBugs is actually a well-used tool - even if you do not have time or the data to fix a bug precisely, you can still add a comment there, and remarkably, things do get fixed. Missing streets on a city's map are an excellent example ... and I found a bunch of those already.

http://openstreetbugs.appspot.com/ should definitely be added to the article.